Got my set on the 30th, took me an evening and half to build. Pretty happy overall with the design and build, I'm using a spare Train RC I had for the steering and and forward, reverse. I find the steering pretty good with it, and think using the servo was the right choice by LEGO, however they should have included one of each remote, the Train one for steering and forward/reverse, and the Technic one for the LA's as they don't really need multiple speeds.
I haven't tried, but I would have thought an LA for steering would be a pain, not being able to easily/quickly centre the steering.
A few questions:
Has anyone had a go at improving the look of the front end and/or the liftarms?
Does everyone else's model have a lot of slop in the bucket tilting, mine can easily move about 40-50 degrees of rotation without the LA moving (The LA's themselves have quite a bit of slop in them).
Is the clicking sound when hitting the LA's bad for the gears, and could clutch gears be added to this somewhere to stop it?